Unity3D异步加载的进度条制作

Unity3D异步加载场景的场景进度条的制作

01.菜鸟一些

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
/// <summary>
/// 加载游戏滑动条-使其平滑加载到100%并跳转到下一个场景
/// </summary>
public class LoadGame : MonoBehaviour {

    public Slider processView;

	// Use this for initialization
	void Start () {
        LoadGameMethod();
        
	}
	
	// Update is called once per frame
	void Update () {
		

    }
    public void LoadGameMethod()
    {
        StartCoroutine(StartLoading_4(2));
    }

    private IEnumerator StartLoading_4(int scene)
    {
        int displayProgress = 0;//进程   displayProgress向toProgress靠拢
        int toProgress = 0;//目标
        //
        //异步加载，并获取加载进度
        //LoadSceneAsync(scene)  返回一个协程（当前进度）
        AsyncOperation op = SceneManager.LoadSceneAsync(scene); 
        op.allowSceneActivation = false; //若设置为false  则会加载到0.89999999暂停

        while (op.progress < 0.9f)
        {
            //op.progress当前进度是一个0~1的值
            toProgress = (int)op.progress * 100;
            while (displayProgress < toProgress)
            {
                ++displayProgress;
                SetLoadingPercentage(displayProgress);
                //WaitForEndOfFrame等待所有的相机和UI等渲染完成
                //因为进度条有变动，需要进行渲染
                yield return new WaitForEndOfFrame();
            }
        }

        toProgress = 100;
        while (displayProgress < toProgress)
        {
            ++displayProgress;
            SetLoadingPercentage(displayProgress);
            yield return new WaitForEndOfFrame();
        }
        op.allowSceneActivation = true;
    }

    private void SetLoadingPercentage(float v)
    {
        processView.value = v / 100;
    }

方式2.简单一些

using UnityEngine;

using System.Collections;

using UnityEngine.UI;

/// <summary>

/// 异步加载进度条

/// </summary>

public class LoadingScene : MonoBehaviour

{
	public Slider processBar;

	private AsyncOperation async;

 
	// 当前进度，控制滑动条的百分比

	private uint nowprocess = 0;

 
	void Start ()

	{

		// 开启一个协程

		StartCoroutine (loadScene ());

	}

 

	// 定义一个协程

	IEnumerator loadScene ()

	{
                //异步加载场景
		async = Application.LoadLevelAsync ("场景名");

		async.allowSceneActivation = false;

		// 下载完成后返回async

		yield return async;

	}

 

	void Update ()

	{

		// 判断是否加载完需要跳转的场景数据

		if (async == null) //没有加载完成
                {

			return;

		}

 

		// 进度条需要到达的进度值

		uint toProcess;

		if (async.progress < 0.9f) {

			//  进度值

			toProcess = (uint)(async.progress * 100);

		}

		else {    // 加载完毕

			// 进度值为100

			toProcess = 100;

		}

 

		// 如果滑动条的当前进度，小于当前加载场景的方法返回的进度

		if (nowprocess < toProcess) {

			// 当前滑动条的进度加一

			nowprocess++;

		}

 

		// 设置滑动条的value

		processBar.value = nowprocess / 100f;

 

		//加载完毕

		if (nowprocess == 100) {

			// 设置为true的时候，如果场景数据加载完毕，就可以自动跳转场景

			async.allowSceneActivation = true;

		}

	}

	

}